Migrate from Nimble to CycloneDX

BSD: set accepted TCP connections as non-blocking

Rewrite Solo5 implementation for CPS

Use compiler string.h builtins if possible

Tweak lwip/opt.h

Add isLinkLocal(IpAddress)

Update build metadata

Add send batching

fixup callback redirections

lwip: implement MEM_LIBC_MALLOC

Bypass osLastError

Internal error callback indirection

Add internal callSendError indirection

BSD: async send

Set a default connection callback for onClose

Refactor BSD send

BSD: wait until accept is readable

Make BSD work

Make TransportProperties a ref object

Refresh lwip sources list